Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-10-24
1991-04-30
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
358494, H01J 314
Patent
active
050120891
ABSTRACT:
In an image recorder, a recording photobeam and a reference photobeam are periodically deflected by a polygon mirror in a main scanning direction. The recording photobeam is supplied to a photosensitive film while the reference beam is supplied to a transparent grating scale on which a transparent area and an opaque area are formed. The combination boundary of the transparent area and the opaque area has a portion parallel to the main scanning direction. The reference beam transmitted through the transparent area is detected, and the photobeams are deflected in a subscanning direction by an acoustic-optical deflector in response to the detected optical amount of the reference photobeam.
REFERENCES:
patent: 4638156 (1987-01-01), Horikawa et al.
patent: 4661699 (1987-04-01), Welmers et al.
patent: 4667099 (1987-05-01), Arai et al.
patent: 4861983 (1989-08-01), Sasada et al.
Cho Masamichi
Kurusu Yasuo
Nagata Shin-ichi
Shirota Hiroyuki
Tomohisa Kunio
Dainippon Screen Mfg. Co,. Ltd.
Nelms David C.
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